What happens if the audio system breaks? Do I need to replace the whole helmet?

It depends on the design. Helmets with drop-in audio systems (like Outdoor Tech Chips) let you simply remove and replace the speaker module without affecting the helmet's protection. The helmet remains fully functional as a helmet even without the audio. Helmets with built-in audio that fails are more problematic — you're left with non-functional speakers in your ear pads, but the helmet still provides full protection. Some brands sell replacement audio ear pads separately. The key point: audio failure never compromises the helmet's safety certification or impact protection.